Unbiased noise test.

Started Feb 28, 2009 | Discussions thread
headofdestiny Veteran Member • Posts: 9,226
Re: Unbiased noise test.

kevm14 wrote:

Iliah Borg wrote:

1Ds MkIII and 5D MKII have very different colour filters. 5D MkII
filters are much more tuned towards the consumer benchmark - "pure"
noise at underexposure.

You can't really compare even noise from the shots you used - those
shots are underexposed to different degrees. Pretty much each camera
model has its ISO calibrated differently. The raw levels at middle
gray sometimes differ as much as 2+ times, that is more than 1 stop.
If you take this into account you should compare, say, D3X at ISO 400
to 5D MkII at slightly more than ISO 200.

I always felt like these tests would be most useful by locking the
shutter speed and aperture and adjusting ISO until the exposure is
right. Then modify shutter speed for the test. Really, what people
need ISO for is to boost the shutter speed or allow the lens to close
down a bit, or both. So the question should be what is the best each
camera can do for a given shutter speed, aperture and EV?

-- hide signature --

That is a great idea.

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